I suggest operator make sure that their system is described, not the KiwiSDR alone. Although the SDR may go from 0-30 MHz, your antenna or a filter may limit the usable range. For example, my system uses a Pixel Loop which is 100 KHz to 30 MHz. So I have my system set up such that on sdr.hu it is shown as 100 KHz to 30 Mhz.
This saves users from getting on your system and thinking they can tune down into the MW or LW range when either a filter or antenna prevents anything usable down there.